To find your copy's CRC look in the PCSX2 console when you boot up the game and find the 8 letter hexadecimal code labelled by 'GSdx Lookup CRC:' There may be many different CRC's depending on your version of the game. In the file name make sure it has the CRC at the start of the title as this is basically FFX's unique identifier and tells PCSX2 which game to apply the cheats too. Once the codes you want are in the file save it in the pcsx2 cheats folder with a. To enable cheats on PCSX2 first go to System and make sure 'Enable Cheats' is tickedNext up is to make the actual cheat file to do this make a new text document and chuck the cheat codes you want in there.
To find the actual cheats for pcsx2 there is this useful forum post that compiles a bunch of cheats for Final Fantasy X: GameShark codes don't work on PCSX2 but you can still use cheats through pnach files.
